On the possibility of contamination of the solar surface by accretion

Details On the possibility of contamination of the solar surface by accretion On the possibility of contamination of the solar surface by accretion

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....59..427g&link_type=abstract

Astronomy and Astrophysics, vol. 59, no. 3, Aug. 1977, p. 427-431.

Physics

2

Abundance, Contamination, Heavy Elements, Neutrinos, Solar Physics, Stellar Evolution, Astronomical Models, Depletion, Lithium Isotopes, Stellar Mass

Scientific paper

Two arguments are presented which seem to prevent any significant increase in the surface abundance (Z) of heavy elements in the sun. Firstly, the observed depletion of Li-7 during the main-sequence phases implies the mixing of at least the outermost 1.75 per cent of the solar mass. Secondly any increase in Z in the outer layers produces either a dynamical or a secular nonradial instability which increases the mass of the contaminated layers enough to dilute accretion effects so as to make them negligible.

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